Child&#39;s building-blocks.



I5 of chlds build/ing block.

non.

MUFBED L. GBEENSTREET, F JOPLIN, MSSOUBI, ASSIGNOB 0F ONE-T 1:1 il.: l` 'I'O ALFRED G. .HOPPOCK AND ONE-THIRD T0 JMIIES H. WRIGHT, BOTH DF-JOPLIN, MISSOURI.

s pecication of Letters Patent.

retenes@ ree. is, iste.

Application tiled Apri125, 1918. Serial No. 230,93.

To all whom t may concern: v

Be it known that I, MILFRED L. GREEN- s'rnnn'r, a citizen of the United States, resid- Fig. 2 is a similar view of another form Eig. 3 is a sectional view through several building blocks assembled.

Fig. 4 isa side elevational view of the form of connecting medium used between the blocks.

Fig. 5 is an edge elevational view of said connecting medium, and

- 6 1s a plan view of said connecting medium.

rI`his invention relates to a new and Vuseful improvement in childs building blocks, the object being to provide blocks with grooves whereby a connecting medium may be introduced into the grooves in the faces of adjacent blocks to hold the blocks together.

My invention contemplates the use of a yielding connection capable of being fric tionally engagedin the grooves of the cons tiguous faces of adjacent blocks, whereby they maybe secured together and held desired positions.

Inthe drawings, 1 indicates a building block in theform of a cube, but-it is -obvious that the 'shape of the block'is imma-l -teria-l, as a number ofdierent shaped blocks may be used'to constitutea set.

llockl is provided with dove tail groove 2 encircling it on four faces, while two parallel groo es 3, also dove'tailed in shape, are f gl arranged n the remaining opposing faces of Y the block.

Y In Fig.' 2, I have shown a 'Ii-shape blocli..

4 as having two parallel vgrooves 5 inits side faces. A cross groove 6' is arranged the bottom face of the block. Y

' 7 indicates a resilient connecting member Ypreferably formedof a bentiwire Ycomposed essentiallyvof members 8 which are designed to enter the groove of one block and angularly disposed members 9 designed to enter the groove of another block, the members 8 and 9 being connected together by the connecting. member 10. rlhe members 8 and 9 are preferably disposed at right angles to each other and are arranged in pairs substantlally parallel to each other and connected by diagonal pieces 8a and 92L respectively, the ends being curved or slightly bent so as to o'er unobstructed surfaces.

In assembling the blocks together, th connecting medium is first introduced into va groove in one block say, for instance, by sliding the members 9 therein. This leaves the members 8 projecting above the face of the block and at right angles to 'the groove whereby another block can' be slid into position in a direction parallel to the aXis of the members 8, until the second block has reached the desired position. The member 10 forms a yielding connecting medium and the dove tail grooves into which the 'members 8 and 9 have been forced with slight friction will serve to hold the blocks inv close proximity to each other until it is desired to separate them.

I am aware that the illustrative form of the invention herein shown may be varied and modified in numerous particulars, and I am also aware that my invention as herein-l parts adapted to be removably positioned within said grooves.

2. Building blocks for childrenV having i continuous dove tail grooves in their contiguous-faces and a yielding-connectin me-V are.

dium having resilient-portions whic adaptedtof frictionally engage in said ooves". f v

3. Building blocks for children having dove-tail grooves in their contiguous faces, and a yielding connecting medium .for said blocks, said connecting medium hav-ing resllient portions for frictionally engaging inV te v*resilient Y 4. ,fBu'l ing blocks for children having Vdo'vetail grooves in their lcontiguous facesY ooves, and a `connection between Isaid:

ortIons.

MMA

im tempmmy balding the blocks-together..

5. A camncting 'medium im' chldlens,

blacks in thg-fnrmof bamt Wire composed/ of members ahgulmly dlspcsed to aaah other and @ommectefl together.

' 5. Toy building Mucke; povded with csaztmuous gmves in *ahei contiguous faces the, sides @if which grooves am undelcu', and

aegns adapted rctiomly engage in said gnomes at any point throughout .the lengths fsbhel'eof l En testimony whereof 'llaarent am 1.1.5 sgnasure in the presence O two Witnesses,

256th daym Apr, 1918.

mmm EL.. GREENSTREM. k Wfbnesses `A @mesa LENA 

